I have been selling on Etsy for 3 years. At first I didn't sell much, but then learned about marketing my shop. I joined a team that sells quilted items. We promote each other. I also do a lot of marketing on my own. You can't just list something and leave it alone. Etsy has weekly chats for getting your sales up. My views have gone from 2 or 3 in a day to a hundred or better a day . I am averaging 2 sales a week - some small items and some things for several hundred dollars. My average sale for a table runner is $25 - $40. I try to price my things comparable to other Etsy sellers. Simple table runners and wall hangings are very popular, and anything Halloween or Christmas in the fall. I also try to purchase fabric on sale and only make things are simple to make (enhanced with quilting). I don't use commercial patterns unless I get permission from the designer.
If you have something unusual or unique it can be a big hit. My fabric paper dolls are an example.
Go to some Etsy stores and look at what has sold in a few shops.
I hope this helps.